[미국특허]
Polymers with improved toughness and ESCR for large-part blow molding applications
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08L-023/08
C08F-004/653
C08F-004/6592
C08F-210/16
C08F-004/659
출원번호
US-0995268
(2016-01-14)
등록번호
US-9550849
(2017-01-24)
발명자
/ 주소
Hlavinka, Mark L.
Yang, Qing
Inn, Yongwoo
Whitte, William M.
Rathman, John R.
Secora, Steven J.
Hert, Daniel G.
출원인 / 주소
Chevron Phillips Chemical Company LP
대리인 / 주소
Merchant & Gould P.C.
인용정보
피인용 횟수 :
1인용 특허 :
63
초록▼
Disclosed herein are ethylene-based polymers having a density greater than 0.945 g/cm3, a high load melt index less than 25 g/10 min, a peak molecular weight ranging from 52,000 to 132,000 g/mol, and an environmental stress crack resistance of at least 250 hours. These polymers have the processabili
Disclosed herein are ethylene-based polymers having a density greater than 0.945 g/cm3, a high load melt index less than 25 g/10 min, a peak molecular weight ranging from 52,000 to 132,000 g/mol, and an environmental stress crack resistance of at least 250 hours. These polymers have the processability of chromium-based resins, but with improved impact strength and stress crack resistance, and can be used in large-part blow molding applications.
대표청구항▼
1. An ethylene/a-olefin copolymer composition having a density in a range from about 0.95 to about 0.965 g/cm3, a high load melt index (HLMI) in a range from about 2 to about 10 g/10 min, a peak molecular weight (Mp) in a range from about 65,000 to about 115,000 g/mol, a Mn in a range from about 30,
1. An ethylene/a-olefin copolymer composition having a density in a range from about 0.95 to about 0.965 g/cm3, a high load melt index (HLMI) in a range from about 2 to about 10 g/10 min, a peak molecular weight (Mp) in a range from about 65,000 to about 115,000 g/mol, a Mn in a range from about 30,000 to about 60,000 g/mol, a Mz in a range from about 1,750,000 to about 4,000,000 g/mol, and a ratio of Mw/Mn in a range from about 7 to about 15. 2. An article comprising the copolymer composition of claim 1. 3. The copolymer composition of claim 1, wherein the copolymer composition has: an environmental stress crack resistance (ESCR) of at least 500 hours;a Tensile Impact in a range from about 450 to about 1000 kJ/m2; anda Charpy Impact in a range from about 25 to about 75 kJ/m2. 4. The copolymer composition of claim 1, wherein the copolymer composition has: an environmental stress crack resistance (ESCR) of at least 1000 hours;a Tensile Impact in a range from about 500 to about 1000 kJ/m2; anda Charpy Impact in a range from about 30 to about 70 kJ/m2. 5. The copolymer composition of claim 1, wherein the copolymer composition is an ethylene/1-butene copolymer composition, an ethylene/1-hexene copolymer composition, or an ethylene/1-octene copolymer composition. 6. A blow molded article comprising the copolymer composition of claim 5. 7. The copolymer composition of claim 1, wherein the copolymer composition has a viscosity at 100 sec−1 in a range from about 2000 to about 3800 Pa-sec. 8. The copolymer composition of claim 1, wherein the copolymer composition has: a bimodal molecular weight distribution; anda weight-average molecular weight in a range from about 325,000 to about 575,000 g/mol. 9. The copolymer composition of claim 8, wherein the copolymer composition is an ethylene/1-butene copolymer composition, an ethylene/1-hexene copolymer composition, or an ethylene/1-octene copolymer composition having a density in a range from about 0.952 to about 0.962 g/cm3. 10. A polymerization process comprising: contacting a catalyst composition with ethylene and an optional olefin comonomer in a polymerization reactor system under polymerization conditions to produce an ethylene polymer composition; wherein the ethylene polymer composition is characterized by:a density of greater than or equal to about 0.945 g/cm3, a high load melt index (HLMI) in a range from about 2 to about 20 g/10 min, a viscosity at 100 sec−1 in a range from about 2000 to about 4000 Pa-sec, a weight-average molecular weight (Mw) in a range from about 275,000 to about 800,000 g/mol, a number-average molecular weight (Mn) in a range from about 30,000 to about 60,000 g/mol, and a ratio of Mw/Mn in a range from about 5 to about 22. 11. The process of claim 10, wherein the polymerization reactor system comprises a slurry reactor, a gas-phase reactor, a solution reactor, or a combination thereof. 12. The process of claim 10, wherein the polymerization reactor system comprises a loop slurry reactor. 13. The process of claim 10, wherein the polymerization reactor system comprises one or two reactors. 14. The process of claim 10, wherein the catalyst composition is contacted with ethylene and an olefin comonomer comprising a C3-C10 α-olefin. 15. The process of claim 10, wherein the catalyst composition comprises two metallocene compounds, an activator, and an optional co-catalyst.
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상세보기
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